BSTJ 40: 6. November 1961: Auxiliary Radio Channels for the TH Radio Relay System. (Hatch, R.W.; Wickliffe, P.R.)

8.7 MB·English

Auxiliary Radio Channels for the
TH Radio Relay System

By RoW, HATCH amd Boi, WICKLIFFE

‘Die operation and miotenanes of the TH ant TD-2 rio rey ye
tome requie camasenion foes alg the route ahh ean be used
for the rowanioian of roi, ptstion stoking and alarm signals, Spe
Pint wort nd mere fon, fern me the masiary lo
Cannel, which hace ber dele aan ated pot af the THY sytem
‘a aun he nn ae dese 2 he pape.

‘ee operation, and wainersance of sho THL sae YD rie yee
esi comcast Eien the toate cir he wed fo
the transmission of vie, pee ewiehig ul lar signals, Ln
ties TT02 vila apetons such facies are typi provid ie
Ties runing appesimatety pale to Ui sad rat, ul len
fits ly several miles, Where sich soparetions sss, alti i

Th flies are requted teen te livihal ran sions itl
{He pale wite-sineeoute, The dein of proc warm b
Inierinenve channels for the transmission of tee goals nithin the

Frsqueneyalleation of the TH syste wee signa arly he TH
steelopinen. Nesvon-band els eis have Teen deg for thi
purpose ger sonnel ow thin paper. These channels called sasiary
Cannes seve beth the TD? and the TH systems where shots ea
eine itl,

“san: proeecding with o deal desion of he gsr channel
syste is smote spstenis atl sna wll et dered

tt The C1 Adar and Cone Sytens

‘oe CL lan and contol stm ws orga desloge fe
swe rh che TD 2 ey, shen dei in pawersns Tat syste,
AR ne ma, sneak RuEH SIC OPRNAD, NOVEBLIE 108

‘es pnpese et allow an eat a alarm center 9 muti he
preston of a umber of unattended rao sasions. An expanded but
Clherwiae tu lar venton now st whieh er fre # ened
Socasion oF 7102 sn TH. A masini of twee uetoended ado

"fations eat be won’ witha eng alarm vente Those ao uty
fevanged so thst nok mene thea ai ners are Lowced an ete sie
CE the alm conten, Asewey Yleefroqneney eeeit enown as Hoe
Slam fine! is-ovidhe frown sac ganup of se sale to the alam
vente ver thi sireut neh station tremely ertinnnus and.
tinotive tone stun of hs ix fegsees 10, 100, 160, 17, 60,
find 2100 eyes) hic ae avaisle for Ue de. ‘These tones ar de
{ected in separate Hreyueney ovketive eis at she acm center. The
|earaption fg tn fer apiveioately ten seconds reisers annie
dnd virus alarm, Bevuove wd satin i ace diferent frequency,
“ho station wha tone fe eneuped i ly atid

‘The removed i wf the satin alarm toner deed above ine
cates that a pueielie anata! station # in trouble, tit dos
ht ides sane Tg ths dete infomation, the acted
fe the alarm er er ea ander over ai om wy voi ceeit™
flowrate veer cna) whieh eomnest to Tae gro ef ax ations
‘he wees gorabt of 8 Lhe wareier mednetee in sequenen by
vette moehinations of bac andi aing fsequenees evaable in
Thvepelo tepe from 27 Bos 11.8 epoea 6p esi paste enon
“ination. cr uf several poi oles ean be rt pana st
ion. pln) oro ight 5 start the gas engi ceroatse or,
Tithie eon to a vert sen indieatons A use inicaions
ste seine th aon is sponse co mores,» mins” SOc
Dae oto seams #0 ele rate over the vo-wite elem fine
Track tothe alarm eentee. Whenever an altwn condi ke encoursered,
{70b.:ycl alee trasiicted saulacronrdy with the #O0-eyele pulse
"The prsente of ZOheele pulse raises tbe appropriate last he
Tighe ou amp esp the alae see

has Vek Clee

2 secon tena, Fite voice visi i ued for tlhe con:
veesitiony shi’ a nil i eamnceion with sytem meters,
Treoreets all ee stations alg a aeton othe sada route wth the

apeeialn aly contez, Kast he “rata oder cine,” this ee
tui sere illy patty tne whic permite an inlividual ix ane vir

te thease Tey

ig ena dep ton th al pa, Tha

ei ee Markane
NW AVATTAC AITREARY RaDro emCTE 169

to talk with on tvidual at ang of the other sitions i the sein
“esis dor sgualing fm one sation to anotee ize provided wa pur
ie CL ayatt,

Additional vuiee cis, ela) “express nado omer eo,
provided over mie Tomar selon a he a te, at cy eed
ations ate connected. Normals thee expres eituite” ill not be
provide over the auxsry chants

ta TD-2 Proweion Setching

"The 7D.-2 prtevtion switching sytem has been descibed in an eur
lier pure Tov sustnay voie chown re rears eh rate
ianarion from the reeiving en the leaning ead TD
suicehing seston, a dates ws moray cums of fon Fe 1
Flteen van hops, When ala the ar rsa elves i He tion
fue working perky a TOs ged lwo Cenrmmniced er Tis
facility, (The giaad tone provers she operation uf TD2 preteen
pills ou eaten gts seh ve he wie shad, aa
Pies neation that we sie-temcomay fwity Ta Ie
Teapeited If devessore he rowing ei ld teas
fn ene of the pogukr T2 sada hase espe and the poe
feotion shone! available sae Foye guard gone is removed
sirloin, ene gon th anne i Woah etranented, Tones
AAPG, TION L380 13 a ITD eyes ae ye for Ue fer

‘Channels, Whew the tone ratesyondicg to a partieslar lune ie
‘vive the trusting onl of the eon, che signal on the reglar
‘Shae fs suuneoned othe sp on, Wow Us the
Feaulee channe! erurns to tnt Fhe pane fe rece: the Ci
Fepresuting fhe nlor eanael be removed aad she TOD gil
jon bested,

La TH Prabetion Swing

The TH protection sstehingevstun deseibe in «companion papes*
esis tase, aii al nf ati La i rach dite
Vin long the vaio rote. Those tones lee ae terval in
the afm 2.3 he to 33.4 ke. OF He siteen tonee teamed in
the dwetion, eh llsomae tues sting at 21.9 ke re mates tenes
for the vight asda ehanneis feing tamsmitted nthe appoie
ticetion, The otter eight {setae for grup of oust ute order tenes
ir Ho wight hannele ekg trill the st ction 38 the

Tins, A tieonteffong ead i nied for ech rnp ner Lae
“Thu forthe sight hanes in given dnseion Chee ae ght posibie
cer toes hese dapetion ad gh stalwsCone in he epee
dissin.

Houecreporter tents are provide in ens wad station wih ean
seietive(g flennate say of the egbt slots tones. the tnsmisson
fon parila bros eh i paired, the eoresponding stat
tenes attented. Phie ation is doveeted al the tvsting end of
the protection ving sevtna, sd willie ction il nite
Here. he ord lei he other dvertion, we thea ed to gal
{or the eoresponding ene he reoiing eu

"To compete with miele frites Ihe ania sands mt pro
vide ¢ lees exprusive end more -elnhie eign for Irueitting the
signals Geeta in the preeeding stein. AW n roti, the euxliory
Clauncls ner the ontenne xj and nemo reese ree
fupoly af the broadband. I ation, the analiry cannes
fly Woublesiecbunl snligade sedation, peste without nadie
Sheneney empinion in tae transiter, sl ose eomponents de
Figued for te brodlsul ane where patie,

Me scence nly iy cebinwed iy peice v9 narow-band
rue shorusts ow ero divrien of isms, Ate rao station,
the hsean nim ws ants of tae be chasms ae eomneted i
Dot La alton, la oar goin eoncrl cients of the rosie
feat Ah seane icin se rere i pale, This ier
onnecifon n° lnstad res al stent ie gin tori int po
idee proteLiou sgt tes he tunerneion pac and enpnent
Thine without ner of antonetie oiehing erent cid tealts
na nea epsizun graves ratio, This ecpont diversity hi
Je fiber advantage of permiting inserven servo of unis for

‘rar sation, ie werent te sernver the baseband signals rt
sineilc eaaponents desorbed i the preveding omvions, ean beaded
Criemoved Fort tsehop rate the meximun lenge of « TH pe
tection emtching metion a total uf ten amplitide mediators and
‘ementantars ave chus conoele in taralesn. To tee he Tncrity
readin these cireil, w ber figuency allan ed Ht
frites vance modulation prot fal outside the signal band,
This has tn the hosed se meetin str Fig 1 Se
ther elvage i overly i aleve by meublatng the
hunk given geting wich baeehand signals whieh are 180° ost
cf phase so thet ever onker sudan, progusts teu to camel when
the boston sig ice rua leah seton,

tes Geavnat

A snap Mor éiagram of a “epic usb ela insalicion
fs sanu in Fig, Ly tae estat ieee sso a he hp
‘lita mnrInedmiereee egos sce recive em ehgaee 10 ne

IHL? Had cosesvers with mertameste AGE vvuite biel wil be
usd grees atin Seotin 1 env Pe hasohand signals
stich re they suming in a Hb, Thi ould hasehcnd signal

ca fet sain Wy cer ga sai pb ana
aie i> pale the sm rei tsmamiters en ean 20 29,
‘Tie sng peso af he ON eariee terminal f bridged orton the
Iorban vires, This permits any of the four Uelephone «ale en the

tice sitet to be ewive a tn nagertve vaio quem. tenmnale
GF the ON equipmest. Tr aldtian, n hn rence cnet san Sk
‘above! i bridged aerore the Inerband cennerton betwen recive and
transite, Signals Frau ce Hensler pean of the oer ON ea:
jor sera are aie Ue seid sghal hy tBeQne ofthe como

tin sown tothe tight ef the tone wporter ‘The fewer ha nf Pig 2
shows ¢ dupliation ot tho fries for tg ler eet of ene

Tile serungunent deseied chore, the baseband signals, including
ine our ON ehanels the 8096 ke Fad, ate conseeced diet fom
‘the mio esceivers ty the radio ttansmitters. 1s this way signals beng

TT fenteney actin ofthe wary sham ie Shari

wt
1Wk2 rom nm sven THPRHEAL GORGE, NOMA Get

cnasmiated Hou «get aia) ate a iain By ete
aration Fo sew Fone and ye Kh absent roation Dek
staat faqs, Hewes the DN ier roaneered inset
vray that signe se enol al eae ov any the oe
hanes ely sive ion. This astangemest penwides ceria a
‘ats amr sn prem te ON feria as andes
fre evel This notin esrb rte nea eet

Wrenn, ny cheve vice eave neqaied at given ston nod
Ie ranged. On the other band, thi aethee of coertion rogues the
Hin chanel carers aS ke eid 2 ke i the ON termina ta he sp

preva tall excep Ue Fes salon hn. sveon, Akal ober stations
tevneckans! ideas male in eed srl ajrent
the tizchsane) eins whieh wignate in he fst seton. Therefore

oiceeeguenn siginbs originating athe daa the fst latin sae
subject to a Sight Erequoney shift oq tothe erence Dwr the
fesinechannel assert the Att sation ad tha of the staien where

the sgl origi
vi sore AUAtLIANY aaBLO cS i)

te Kasio Trower

bloc diagrams of the rin stant ie showin Pig. 8 The be
nang! x eombined wth «menor cari d the fst maulator
ho transmitter modulator to produee 4 dauhlesideband, sem
tude modulated sigur This merowave signal, in tum, i ited to the
ssid une! by emisiningt wi Hae pal of erpaalevontrelle,
‘mils in send elle "The output of tis eseond randlator
he frequeney shift mouslater contains amplieide modulated
Cerin: cressnling bh hou ad the eferenee of the to
ie freqzenvies. The bandpass Alter sects the desized signal. ‘The
jiolaer followag the busdpus #lter provides gead termina:ions for
aie the flonan che hasan ete Uongh hic tae
UCnusiter ie wraeted bs he we sen,

a4 Teaamiter Matudato

The trssmitter modlator, shown ia Fig dy conse of «dal iene
ston sorlat dimetiont. roupie, a dinde mow, sal a bese'and
ousting network. Tt ie omy celetd ve the Sroecdhand ceansm:zte
tnsduloto, deveribed ‘a w reves aril,» with acaptatione for anpli=
fue mucin ave Th serveur silemaatae andthe ener
dlrveconal apr ane wed ta ance and et ae meow ae pt
seer Fig, Se snptod tunis of Whe ammitter malo.
166 nip ort sys mucustoat 1oeRRAG, NOVA JO

Pig Monae of anetigy ohana! Urano

“Th ehort soe dnveiontl euler Cis the incoming erosive eae
ier equally becween the ou dndew ox and cus. Exel die asorie
i Teton ofthe eid tue sal sles the renner. The de
tional coupes dy ds rash ae oeted sigs mpl Hrtsere the = ane
Gor oss Henrse the phase characte of che eieetona, coupler
Sone Uvo flected sguate to ms the ee pest and to eantcl
torre sent, Ata eect she sig a. the Cr partis proportional t
Ueno eReston eat Ihe ded, and she vi
deal the 3 port sroportiov alte the ieee, The veel
ics abs determined. ly (ve wiersease ining adjustments (ie
unin tat 3) and the ded bigass, Wl there tn asjustaente
Tins prmetly-l, the mega a the zofecion velvet ares el
The ld bing an te mle swans east, oe ve arrive pet
there fe value feeb anny rr fe magaitude ofthe reteetion
Sethe sre ineoasy wit the vive hin. T the lo-equeney has
Trond sigs sv seriposed um Us docs, te wtleeion coecient

an, jn ira, He rigoal ak the ous port an? cenlitude mevdlated. The
Shine ssernines the eamier power ut he amplitude of tho super
imped tse signals deversies Fe pe seat, madnlaton. Vera
lines of le snieowsve cance iapeb pees varistions in both the
roitwane efssiee ongput cn the per rut madltion. To mnie
Unser variations, the diodes giv operated sith a combination of wl
snd seine, Ket eareets owing trey and win proare

the elie: th vedi. fs doeleped geroes x, Teor 1 al 2
Mig Spied et fd eseer mete

al epacitns oF gal 12 sunny Suara vets ang the biat
"The fegseney shit: wdc sieves and operation

to the exci supply siidate leveled in a motion papers Phe
Inve sen ing, 3 eae the pesoartance ote md lato,

4.24 Frngurney Shift ocitiatr

"The froqueney sift owls is « conventions exile bn am
ge eeahination. The feqney detersning. lectin the oe lor
gs erigeresouant overtone eevstl. Nosmally, the teen ie
[P25 me, Hewover, whew only one antenna is pvt for eh dive

tion of sates the ene 30 tensile i empty ees
Ietousnel 2% at te Sete of te sociated elt ie eanged
Ir Heated eurest fens a ede poner moniter in the ontet
dno al the buon ampiine psn tes a sotive espe Mag
fovtuecem in tm capt power oe ner asp snes the dey
Uo operate sd, in turn, to antiate an alarm. Singh The ios a
tie- ely ean eeoutpa alae Gore GO nso al 6302 ne
sevens oimateted tothe tesemiter mda he fran of sine
ilar alam in #36 srequeaey hit eset fs in fel, al aay
With rie in, seri vnewNIPNT SOUENAL, NOVEM

signifeant redaction i fe yput ef Ube ausiliany channel teanemitier
‘oi state an alam,

sia Rusia Bower

A blank sehesitic of ue rf weeiver is Siown in Fig. Ae Tho ie
suming ictowrate tush, bir hae bee seein hy Pie channel 2
tation network, inna tothe eoiser ecto trent boot
post fier ‘Te rower mdklator sbi Fre wierowave sna to e
TP of G12 mo by combing the wevrning Spal wth a beatae
Frspene ela! oor the mann iietowaceenctir supply xeon,
tse ai the hoedbaad pio ewer.» Phe abt quent 5.3
tne is norvally ueea with thw caries apply todas 2045 me i
{rd when ths chanel 20 reeves temporal wsigned (nL rane
28 obo "Thistesporary assign wren at how stations ened
‘tl on oe sutenn for eur etion of trast.

"The 42-me ouyel of se seer mova ample ina threo
stage preamplifier tod is connect la the TF-amplierUrugh an TF
Ssttenntar. The Sed pdb eel ade th input power in the TF
Smplior alt espe fr diving Pe-pace pac Ines bese
pester stabros tps aie? ey The fet ree eeagce of the TF
fmplior are snselles By paras antemetie gaz eubry (AGC

omental